نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، پردیس دانشکده‌های فنی، دانشگاه تهران، صندوق پستی 4563-11155، تهران- ایران

2 پژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم وفنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی 8486-11365، تهران- ایران

10.24200/nst.2021.1185

چکیده

توانایی نانوذرات تیتانوسیلیکات ساخته ­شده به‌­روش آب­گرمایی وعامل­دار­شده با گروه عاملی آمینه­­ (2TiSiNH) برای جذب یون‌های توریم­ (IV)ازمحلول‌ها‌ی آبی درسیستم ناپیوسته بررسی شد. اثر چهار متغیر مستقل فرایندی شامل pH محلول، غلظت اولیه‌­ی توریم(IV)­، مقدار جاذب ­و دما با استفاده از روش سطح پاسخ (RSM) بر پایه­‌ی طرح مرکب مرکزی (CCD)مورد ارزیابی قرارگرفت.اعتبارمدل درجه‌­ی دوم با استفاده از ضریب تعیین بررسی شد. نتایج بهینه‌­سازی نشان داد که میزان­ جذب توریم (IV)­تحت شرایط بهینه،­04/83میلی­‌گرم بر­گرم است. نتایج مدل‌سازی نشانداد که داده‌­های تجربی سینتیک جذب توریم، بهوسیله‌­ی‌ مدل دونمایی بهتر برازش می‌­شوند وایزوترم لانگمویرداده­‌های تجربی تعادلی جذب را به خوبی توصیف می‌کند. حداکثرظرفیت جذب 2TiSiNH برای توریم به‌وسیله‌­ی ایزوترم لانگمویر1-mg g  71/87 تخمین زده شد.

کلیدواژه‌ها

عنوان مقاله [English]

Use of response surface methodology for optimizing process parameters of thorium adsorption on amino-functionalized titanosilicate nanoparticles

نویسندگان [English]

  • P. Manouchehri 1
  • S. A.Milani 2
  • H. Abolghasemi 1

1 Faculty of Chemical Engineering, University of Tehran, P.O.Box:11155-4563, Tehran- Iran

2 Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box: 14893-836, Tehran – Iran

چکیده [English]

The ability of amino-functionalized hydrothermally synthesized titanosilicate nanoparticles (TiSiNH2) was investigated for the adsorption of Th(IV) from aqueous solutions in batch mode. The effects of four process independent variables including pH, initial metal concentration, sorbent amount and temperature were investigated using response surface methodology (RSM) based on central composite design (CCD). The accuracy of model was verified by coefficient of determination. The results of optimization showed that the sorption capacity of TiSiNH2 for Th(IV) under optimal conditions was 83.04 mg g-1. The results of modeling showed that, experimental data of adsorption capacity of sorbent for Th(IV) were better fitted with double exponential kinetic model and Langmuir isotherm can describe the equilibrium data well. The maximum adsorption capacity of TiSiNH2 for Th(IV)­ was estimated to be 87.71 mg g-1 by Langmuir isotherm.

کلیدواژه‌ها [English]

  • Adsorbtion of thorium
  • titanosilicate
  • Functionalized
  • Response surface methodology (RSM)
  • Central composite design (CCD)

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